You Give an Orbiting Satellite a Command to Rotate Through $\theta$

Multiple Choice

You give an orbiting satellite a command to rotate through an angle given by where a,b,and c are constants and $\theta$ is in radians if t is in seconds.What is the angular acceleration of this satellite at time t?

A) at
B) a + b - c
C) -12
D) 2b - 12ct²
E) zero